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Abstract

The nano-sized Y2O3 dispersed W composite powder is prepared by ultrasonic spray pyrolysis of a tungsten precursor using ammonium metatungstate hydrate and a polymer addition solution method using Y-nitrate. XRD analysis for calcined powder showed the formation of WO2 phase by partial oxidation of W powder during calcination in air. The TEM and phase analysis for further hydrogen reduction of calcined powder mixture exhibited that the W powder with a uniform distribution of Y2O3 nanoparticles can be successfully produced. These results indicate that the wet chemical method combined with spray pyrolysis and polymer solution is a promising way to synthesis the W-based composites with homogeneous dispersion of fine oxide particles.
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Bibliography

[1] W.D. Klopp, J. Less-Common Met. 42, 261 (1975).
[2] V. Philipps, J. Nucl. Mater. 415, S2 (2011).
[3] L. Veleva, Z. Oksiuta, U. Vogt, N. Baluc, Fusion Eng. Des. 84, 1920 (2009).
[4] Z. Dong, N. Liu, Z. Ma, C. Liu, Q. Guo, Y. Liu, J. Alloys Compd. 695, 2969 (2017).
[5] C. Ren, Z.Z. Fang, M. Koopman, B. Butler, J. Paramore, S. Middlemas, Int. J. Refract. Met. Hard Mater. 75, 170 (2018).
[6] M.H. Nguyen, S.-J. Lee, W.M. Kriven, J. Mater. Res. 14, 3417 (1999).
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[8] T.R. Wilken, W.R. Morcom, C.A. Wert, J.B. Woodhouse, Met. Trans. B 7, 589 (1976).
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Authors and Affiliations

Hyeonhui Jo
1
Young-In Lee
1 2
ORCID: ORCID
Myung-Jin Suk
3
Young-Keun Jeong
4
ORCID: ORCID
Sung-Tag Oh
1 2
ORCID: ORCID

  1. Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  2. Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
  3. Kangwon National University, Department of Materials Science and Engineering, Samcheok 25913, Republic of Korea
  4. Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea
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Abstract

An optimum route to synthesis the W-based composite powders with homogeneous dispersion of oxide nanoparticles was investigated. The La2O3 dispersed W powder was synthesized by ultrasonic spray pyrolysis using ammonium metatungstate hydrate and lanthanum nitrate. The dispersion of Y2O3 nanoparticles in W- La2O3 powder was carried out by a polymer addition solution method using yttrium nitrate. XPS and TEM analyses for the composite powder showed that the nano-sized La2O3 and Y2O3 particles were well distributed in W powder. This study suggests that the combination processing of ultrasonic spray pyrolysis and polymeric additive solution is a promising way to synthesis W-based composite powders.
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Authors and Affiliations

Youn Ji Heo
1 2
ORCID: ORCID
Eui Seon Lee
1
ORCID: ORCID
Jeong Hyun Kim
1
ORCID: ORCID
Young-In Lee
1 2
ORCID: ORCID
Young-Keun Jeong
3
ORCID: ORCID
Sung-Tag Oh
1 2
ORCID: ORCID

  1. Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  2. Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
  3. Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

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